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RAID10工作原理图解及特点分析
RAID 10: Very High Reliability combined with High PerformanceCharacteristics/Advantages1. RAID 10 is implemented as a striped array whose segments are RAID 1 arrays2. RAID 10 has the same fault tol...
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RAID7工作原理图解及特点分析
RAID 7: Optimized Asynchrony for High I/O Rates as well as High Data Transfer RatesArchitectural Features:1. All I/O transfers are asynchronous, independently controlled and cached including host in...
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RAID6工作原理图解及特点分析
RAID 6: Independent Data disks with two independent distributed parity schemesCharacteristics/Advantages1. RAID 6 is essentially an extension of RAID level 5 which allows for additional fault tolera...
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RAID5工作原理图解及特点分析
RAID 5: Independent Data disks with distributed parity blocksCharacteristics/Advantages1. Highest Read data transaction rate2. Medium Write data transaction rate3. Low ratio of ECC (Parity) disks ...
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RAID4工作原理图解及特点分析
RAID 4: Independent Data disks with shared Parity diskCharacteristics/Advantages1. Very high Read data transaction rate2. Low ratio of ECC (Parity) disks to data disks means high efficiency3. High...
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RAID3工作原理图解及特点分析
RAID 3: Parallel transfer with parityCharacteristics/Advantages1. Very high Read data transfer rate2. Very high Write data transfer rate3. Disk failure has an insignificant impact on throughput4....
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RAID2工作原理图解及特点分析
RAID 2: Hamming Code ECCCharacteristics/Advantages1. “On the fly” data error correction2. Extremely high data transfer rates possible3. The higher the data transfer rate required, the better the...
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RAID1工作原理图解及特点分析
RAID1: Mirroring and DuplexingCharacteristics/Advantages1. One Write or two Reads possible per mirrored pair2. Twice the Read transaction rate of single disks, same Write transaction rate as singl...
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RAID0工作原理图解及特点分析
RAID 0: Striped Disk Array without Fault ToleranceCharacteristics/Advantages1. RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate dis...
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SQLSERVER分区
关于sqlserver2005的分区msdn上有个详细的讨论http://msdn2.microsoft.com/zh-cn/library/ms345146.aspx
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oracle大事记
1977年6月,Larry Ellison,Bob Miner和Ed Oates,在硅谷创办了oralce的前身Software Development Laboratories，SDL1978年oracle version 1,用汇编语言编写,运行在rsx的pdp-11上,仅有128k内存.实现分离了用户代码和ora...
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oracle9i相关概念
需要搞清楚的问题方案（schema）和表空间是没有关系的，也就是说....oralce最多允许有多少个字段？
